Halcampidae
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Halcampidae is a
family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...
of
sea anemone Sea anemones ( ) are a group of predation, predatory marine invertebrates constituting the order (biology), order Actiniaria. Because of their colourful appearance, they are named after the ''Anemone'', a terrestrial flowering plant. Sea anemone ...
s. Members of this family usually live with their column buried in sand or other soft substrates.


Genera

Genera in the family include: * '' Acthelmis'' Lütken, 1875 * '' Cactosoma'' Danielssen, 1890 * '' Calamactinia'' Carlgren, 1949 * '' Calamactis'' Carlgren, 1951 * '' Halcampa'' Gosse, 1858 * '' Halcampaster'' * '' Halcampella'' Andres, 1883 * '' Halcampoides'' Danielssen, 1890 * '' Halianthella'' * '' Kodioides'' * ''
Mena The Middle East and North Africa (MENA), also referred to as West Asia and North Africa (WANA) or South West Asia and North Africa (SWANA), is a geographic region which comprises the Middle East (also called West Asia) and North Africa together ...
'' * '' Metedwardsia'' * '' Neohalcampa'' * '' Parahalcampa'' * '' Pentactinia'' Carlgren, 1900 * '' Scytophorus'' Hertwig, 1882 * '' Siphonactinopsis'' Carlgren, 1921


Characteristics

Species of Halcampidae mostly have elongated columns which are sometimes differentiated into different regions. The base is usually rounded but in some species it is flattened. There is no sphincter. There are up to forty tentacles, all of equal length. There are up to twenty pairs of perfect
mesenteries In human anatomy, the mesentery is an organ that attaches the intestines to the posterior abdominal wall, consisting of a double fold of the peritoneum. It helps (among other functions) in storing fat and allowing blood vessels, lymphatics, a ...
(internal partitions) with strong retractors. There are one or two
siphonoglyph The siphonoglyph is a ciliated groove at one or both ends of the mouth of sea anemones and some corals. The siphonoglyph extends into a pharynx and is used to create currents of water into the pharynx. These water currents are important for respirat ...
s (ciliated grooves).Family Halcampoididae
Marine Species Identification Portal. Retrieved 2011-10-08.


References

Metridioidea Cnidarian families {{Actiniaria-stub